Free Online Unit Converters

Convert between any units instantly with our collection of 30+ free unit converters. From length and weight to temperature, speed, data storage, and cooking measurements — get accurate conversions right in your browser.

Free, fast, and runs entirely in your browser — no signup, no upload to a server.

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All Unit Converters

• Length Converter
• Weight Converter
• Temperature Converter
• Area Converter
• Volume Converter
• Speed Converter
• Time Converter
• Energy Converter
• Pressure Converter
• Fuel Converter
• Data Storage Converter
• Angle Converter
• Frequency Converter
• Power Converter
• Force Converter
• Density Converter
• Torque Converter
• Electric Current Converter
• Voltage Converter
• Resistance Converter
• Capacitance Converter
• Inductance Converter
• Luminance Converter
• Illuminance Converter
• Magnetic Field Converter
• Radioactivity Converter
• Acceleration Converter
• Flow Rate Converter
• Viscosity Converter
• Cooking Converter

Other categories

• Image Tools
• PDF Tools
• Unit Converters
• Calculators
• Developer & SEO
• Text & Writing
• Color Tools
• Password & Security
• Productivity
• Health & Fitness
• WhatsApp Tools
• Random & Fun
• File & Data

Standards and official sources for Unit Converters

• NIST unit conversion factors — Reference conversion factors we validate against.
• Legal Metrology, Government of India — Indian rules on units in trade and packaging.
• BIPM — the SI Brochure — Definitive definitions of SI base and derived units.
• NIST Special Publication 811 — US guide for correct use of the SI.
• MDN Web Docs — Mozilla's open reference for the browser APIs these tools run on.